3m Wave Form Helix Spring for Wave Motion Demonstration Science Classroom and inner ear anatomy for

and inner ear anatomy for upper-level anatomy teaching

5 mm in diameter

Engineered with a higher spring constant than a classic coiled novelty spring

Hand-painted 4-part human brain model separates into cortical hemispheres and brain-stem regions for lobed-anatomy teaching at introductory biology levels

3oz each in a 2-pack for double-sized chemistry-themed drinking vessels

3m Wave Form Helix Spring for Wave Motion Demonstration Science Classroom and inner ear anatomy forClosing to 3m and extending to 9m, this 20mm diameter steel helix carries longitudinal, transverse, and standing waves visibly enough to compare amplitude, frequency, and S wave vs P wave behavior.